Incremental utility of Live/Real time three-dimensional transesophageal echocardiography in diagnosis of a unique type of subaortic membrane: a case report.

Discrete subaortic membranes are rare congenital abnormalities which may cause hemodynamic consequences secondary to left ventricular outflow obstruction. It may present as an isolated abnormality or may accompany other congenital abnormalities such as ventricular septal defects and bicuspid aortic valve (BAV). Two dimensional (2-D) and recently three dimensional (3-D) echocardiography is used in diagnosis and estimation of the severity of the stenosis in this clinical entity. In this report, we used 3-D echocardiographic examination to identify the anatomical properties of a unique type of subaortic membrane extending to the left ventricular posterolateral wall associated with BAV.